Lyme-Old Lyme High School is a public high school in Old Lyme, Connecticut. It serves grades 9 through 12 and is the only high school operated by Lyme-Old Lyme Schools.
Serving 367 students in grades 9-12, Lyme-old Lyme High School ranks in the top 10% of all schools in Connecticut for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 65-69% (which is higher than the Connecticut state average of 41%). The percentage of students achieving proficiency in reading/language arts is 85-89% (which is higher than the Connecticut state average of 50%).
The student-teacher ratio of 10:1 is lower than the Connecticut state level of 12:1.
Minority enrollment is 19% of the student body (majority Hispanic), which is lower than the Connecticut state average of 54% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 367 students
- Student-Teacher Ratio: 10:1
- Minority Enrollment: 19%
- Graduation Rate: ≥95% (Top 10% in CT)
- Overall Testing Rank: Top 10%
- Math Proficiency: 65-69% (Top 20%)
- Reading Proficiency: 85-89% (Top 1%)
- Science Proficiency: 70-74% (Top 20%)
- Source: National Center for Education Statistics (NCES), CT Dept. of Education
Top Rankings
Lyme-old Lyme High School ranks among the top 20% of public schools in Connecticut for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
Student Attention
School Overview
Lyme-old Lyme High School's student population of 367 students has declined by 18% over five school years.
The teacher population of 38 teachers has declined by 11% over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
367 students
Total Classroom Teachers
38 teachers
Colors
Blue and Gold
School Rankings
Lyme-old Lyme High School ranks within the top 10% of all 939 schools in Connecticut (based off of combined math and reading proficiency testing data).
The diversity score of Lyme-old Lyme High School is 0.34, which is less than the diversity score at state average of 0.68. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#74 out of 939 schools
(Top 10%)
(Top 10%)
Math Test Scores (% Proficient)
65-69%
41%
Reading/Language Arts Test Scores (% Proficient)
85-89%
50%
Science Test Scores (% Proficient)
70-74%
47%
Student-Teacher Ratio
10:1
12:1
Asian
6%
5%
Hispanic
8%
32%
Black
1%
12%
White
81%
46%
Two or more races
4%
5%
All Ethnic Groups
Graduation Rate
≥95%
89%
Chronically Absent Students
(22-23)16.4%
19.3%
Eligible for Free Lunch
10%
38%
Eligible for Reduced Lunch
3%
6%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CT Dept. of Education
Frequently Asked Questions
What is Lyme-old Lyme High School's ranking?
Lyme-old Lyme High School is ranked #74 out of 939 schools, which ranks it among the top 10% of public schools in Connecticut.
What schools are Lyme-old Lyme High School often compared to?
Lyme-old Lyme High Schoolis often viewed alongside schools like East Lyme High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
65-69% of students have achieved math proficiency (compared to the 41% CT state average), while 85-89% of students have achieved reading proficiency (compared to the 50% CT state average).
What is the graduation rate of Lyme-old Lyme High School?
The graduation rate of Lyme-old Lyme High School is 95%, which is higher than the Connecticut state average of 89%.
How many students attend Lyme-old Lyme High School?
367 students attend Lyme-old Lyme High School.
What is the racial composition of the student body?
81% of Lyme-old Lyme High School students are White, 8% of students are Hispanic, 6% of students are Asian, 4% of students are Two or more races, and 1% of students are Black.
What is the student-teacher ratio of Lyme-old Lyme High School?
Lyme-old Lyme High School has a student ration of 10:1, which is lower than the Connecticut state average of 12:1.
What grades does Lyme-old Lyme High School offer ?
Lyme-old Lyme High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Lyme-old Lyme High School part of?
Lyme-old Lyme High School is part of Regional School District 18.
School Calendar
View the Lyme-old Lyme High School yearly calendar below.
School Reviews
Review Lyme-old Lyme High School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
AI Report Cards: Should Schools Evaluate AI Use?
Explore whether schools should assess student AI use, the benefits, risks, and what responsible AI report cards could look like in 2026.
The Parent’s Guide to School Cell Phone Bans in 2026
Learn how school cell phone bans work in 2026, why districts are adopting them, and what parents should expect.
Parental Involvement in Public Schools: 2026 Update
Explore the latest 2026 trends, research, and strategies shaping parental involvement in public schools and student success.
